Building Matrix via SQL - sql

Question

I am using two query from a schema which counts companies, but I am struggling how to combine them give Columns as Country and Industry as row and give the company counts accordingly.
select g.simpleindustrydescription, count(c.companyid) as companycount from ciqcompany c
join ciqsimpleindustry g on g.simpleIndustryid = c.simpleIndustryid
join ciqbusinessdescription b on b.companyid = c.companyid
group by g.simpleindustrydescription
select g.country, count(c.companyid) as companycount from ciqcompany c
join ciqcountrygeo g on g.countryid = c.countryid
join ciqbusinessdescription b on b.companyid = c.companyid
group by g.country
Expected Output:
Country A Country B Country C
Industry A 5 5 6
Industry B 3 3 4
Industry C 4 8 6

Answer 1

Due to lack of real example data, here a simple pivot example basing on some dummy records:
CREATE TABLE #tCountry
(
ID INT
,Name NVARCHAR(100)
);
INSERT INTO #tCountry VALUES (1, 'Country A'), (2, 'Country B'), (3, 'Country C');
CREATE TABLE #tIndustry
(
ID INT
,Name NVARCHAR(100)
);
INSERT INTO #tIndustry VALUES (1, 'Industry A'), (2, 'Industry B'), (3, 'Industry C');
CREATE TABLE #tMapping
(
ID INT
,CountryID INT
,IndustryID INT
,Name NVARCHAR(100)
);
INSERT INTO #tMapping VALUES (1, 1, 1, 'Country A Industry A - 1'), (2, 1, 1, 'Country A Industry A - 2');
INSERT INTO #tMapping VALUES (3, 1, 2, 'Country A Industry B - 1'), (4, 1, 2, 'Country A Industry b - 2'), (5, 1, 2, 'Country A Industry b - 3');
INSERT INTO #tMapping VALUES (6, 2, 1, 'Country B Industry A - 1');
DECLARE #lCountries NVARCHAR(max) = N'';
DECLARE #stmt NVARCHAR(MAX) = N'';
SELECT #lCountries += N', ' + QUOTENAME(CountryName)
FROM(
SELECT DISTINCT tc.Name CountryName
FROM #tCountry tc
JOIN #tMapping tm ON tm.CountryID = tc.ID
) x;
SELECT #lCountries = STUFF(#lCountries, 1, 2, '');
SELECT #stmt = 'SELECT *
FROM
(
SELECT ti.Name IndustryName, tc.Name CountryName, COUNT(*) MappingCounter
FROM #tMapping tm
JOIN #tCountry tc ON tm.CountryID = tc.ID
JOIN #tIndustry ti ON tm.IndustryID = ti.ID
GROUP BY ti.Name, tc.Name
) t
PIVOT (MAX(t.MappingCounter) FOR CountryName in (' + #lCountries + ')) AS x';
EXEC sp_executesql #stmt
Anyways, if you are dealing with an unknown number of countries, you might want to extend this example a little and use dynamic SQL in order to build the pivot statement. Got an example somewhere, but would have to search for it...
Result of my example:
IndustryName Country A Country B Country C
Industry A 2 1 NULL
Industry B 3 NULL NULL